Sash-lock.



L. R. EDDY.

SASH LOCK.

APPLICATION FILED 111111.23, 1911.

1,076,650. Patented 001. 21, 1913.

COLUMBIA PLANOGRAPH c0., WASHINGTON. D. c.

LAWRENCE R. EDDY, 0F ELIZABETH, NEW JERSEY.

SASI-I-LO CK.

intense.

Specification of Letters Patent.

Patented Oct. 21, 1913.

Application filed March 23, 1911. Serial No. 616,517.

To all whom it may concern 1 Be it known that I, LAWRENCE R. EDDY, a citizen of the United States, and a resident of Elizabeth, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Sash-Locks, of which the following is a specification.

The invention relates to improvements in sash-locks of that description which are mounted on the meeting-rails of the sashes whereby the window can be secured to prevent opening of the same from the outside.

More particularly the invention relates to improvements in the sash-lock disclosed in Patent 917,567, granted to me April 6, 1909. In the patented device, when two locking members come together, the drop-latch is held in a raised position so that it cannot fail to hold the bolt in a retracted position. Consequently when the locking members are together in that device it is necessary to hold the bolt in a retracted position with one hand while the other hand is employed in opening the window. This is inconvenient, partlcularly so where the sashes are heavy or do not move easily and both hands could be employed to a better advantage in raising the sash than one.

The invent-ion in the present instance has for its object the provision of means whereby the drop-latch is freed after the locking members come together so that it can operate to hold the bolt in a retracted position, thereby enabling one to use both hands in opening the window.

It also has for its object the improvement in certain details of construction to increase the efficiency of the patented device.

The invention consists in the novel construction, combination and arrangement of parts hereinafter described, pointed out in the appended claims and illustrated 1n the accompanying drawings.

In the accompanying drawings, in which similar reference characters designate corresponding parts, Figure-1 is a plan View of a sash-lock embodying the invention, showing the locking members separated. Fig. 2 is a horizontal sectional view showing the locking members engaged. Fig. 3 is a front elevation of the main part of the lock. Fig. 4 is a sectional view on the line 41- 1 of Fig. 1. Fig. 5 is a similar view on the line 55. Fig. 6 is a detail perspective view of one of the parts. Fig. 7 is a detail perspective view of the latch spring. Fig. 8 is a detail perspective view showing a removable operating key or lever.

The meeting-rails 1 and 2, respectively, of the upper and lower sashes of a window are of the usual construction. On the meeting-rail 2 is the main casing comprising the shell 3 and the base 1 attached to the rail by the screws 5. The main shell and base are secured together by the screw 6. 1n the face 7 of the main casing is the opening 8 having the enlargement 9 at one end. In the top of the casing is a continuation 91 of the enlargement 9. Through the opening in the face of the main casing projects the bolt 10 when the latter is in looking position, as shown in Fig. 2. The outer end of the bolt is enlarged to form the head 11, adapted to pass through the enlargement 9 of the opening. The body of the bolt is provided with an elongated bearing 12 registering with the screw 6 which forms a pivot for the bolt. This bearing is of sufficient length to permit the bolt to be moved outwardly and in wardly of the casing during the locking and unlocking movements. The inner end of the bearing is enlarged so as to give a free movement to the bolt.

Means for advancing and retracting the bolt 10 are provided. On the rear or inner end of the bolt is the pin 13 with which ongages the arm 14 integral with the operating lever or key 15, projecting through the opening 16 in the back of the main casing. The integral arm 14 and key 15 are fast on the shaft 17 journaled at its ends in the top and bottom of the main casing. On the upper end of the shaft 17 is secured the inner end of the coiled spring 18, the outer end of which engages the recess 19 in the angular plate 20, which is held in place by the spurs 21 projecting from its edges into the top and bottom of the main casing, and the inner end of the spring 18 engages a recess 54 in the arm 1a, the spring thereby being held in place. 'The operating lever or key 15 serves to turn the shaft 17 against the action of the spring 18 to retract the bolt through the toggle-joint formed by the arm 14: and the pin 10. The under edge of the angular plate 20, as at 51, is cut away to permit the passage of the bolt. The plate 20 forms a bearing for the upper side of the bolt to hold the latter in place. On one side of the angular plate 20 is the offset 50 extending toward the face plate 7 adjacent to the edge of the opening 8. off-set forms a stop against which the 'bolt 10 strikes at the outward limit of its movement as shown in Fig. 2.

In the main casing in the space between the face plate .7 and the angular :plate 20 is the drop-latch 22 pivoted on the bearin projecting from the angular plate 20. The

opening in the drop-latch receiving the bearing 231s enlarged so that the drop-latch can have a'horizonta'l movement as well as a verwhich also normally presses the drop-latch inward against the angular plate 20, as shown in Fig. 2. As the spring 24 is much weaker than the spring 18 it presses the drop-latch inward only when the latter is free from the "bolt 10. :On the free end of the drop-latch is the lug 25 adapted to register with the'opening 9 91 in-the face and top of the main casing. The 'face of the lug 25 is curved to form a bearing surface 26. On the under side of the drop-latch is the cam 27; and on the extreme outer end is the stop 28 to limit the downward movement of the drop-latch by engaging the bottom of the casing. This stop 28 also'engages the edge of the face 7 adjacent to the opening 9 and prevents the drop-latch from being forced outward through the opening.

On the top of the meeting-rail l of the upper sash is the "supplemental casing 29 having a. face 30 to fit the face '7 of the main casing. In the face 30 is an opening 31 with an enlargement 32'to register with the opening 8 and enlargement 9 in the face of,

the main casing.

The operation of the device is as follows: When the locking members are engaged they are in the relative positions shown in Fig. 2. The bolt 10 projects from the main casing into the supplemental casing with its shank extending through the reduced openings 8 and 31 and its head 11 engaging the adjacent edges of the face 30 of the supplemental casing. In this position the bolt rests against the stop 50 of the plate 20. The tension of the spring 18 forcing the head of the bolt against the edges of the face 30 of the supplemental casing draws the two'casings together so that the window cannot be opened from the outside and also will prevent rattling. To unlock the winrotates the shaft 17 against the action of the spring '18, and through the toggle-joint formed by the arm 14 and pivot 13, the bolt 10 is turned on the pivot 6 free from the This supplemental casing into the main casing. The elongated bearing'12 of the bolt on the pivot 6 permits the head 11 of the bolt to swing clear of the openings 81, 8, through the enlargements 82, 9 into the interior of the main-casing. During this movement of the bolt it engages the cam 27 on the under side of the drop-latch 22 and raises the latter against the action of the spring 24 so that the bolt can pass beneath the drop-latch. r

When the bol't passes the drop-latch the lat in Fig. 1,-a:nd holds it in its retracted position. As the spring 18 is much stronger than the spring 24-it will press the bolt forward until the bearing face 26 oft-he lug 25 contacts with the face 30 of the supple mental casing29. As the lug 25 is considerably longer than the opening 32 in the supplemental casing 29, the lug cannot enter the opening; when the two casings are together. After the drop latch falls in front of the bolt the "key 15 can be released and both hands 'employed in opening the window. While the main and supplemental casings of the lock are together and the bolt is pressing against the drop-latch, the bearing face 26 of the lug 25 of the drop-latch presses against the face 30 of the supplemental casing 25), as shown by dotted lines in Fig. 4. hen the main andsupplemental casings of the lock are separated, through the opening of the window, the lug 25 is forced forward by the spring 18 against the action of the spring 24 through :theopening 9 in the face of the main casing, "as shown in 'Fig. 1. In this forward position the lug 25 is in position to trip the drop-latch.v

When the main and supplemental casings are moved together by the closing of the window the top of the supplemental casing engages the under side of the lug 25 and raises the drop-latch against the action of the spring 24 and frees the bolt 10 so that the latter can be moved to the locking posi- 'tion shown in Fig. 2 through the action of the spring 18. 'When the bolt is freed by the clro-p latch the latter is moved by the spring 24 into the interior of the main casing so that the lug 25 clears the top of the supplemental casing and the droplatch is in a position to fall when the bolt is retracted as previouslysta'ted. The inward movement of the drop-latch is limited by the side of the angle plate 20, against which it is pressed by the spring 24.

In Fig. 8 is shown a detachable key or operating lever that may be used instead of the fixed key '15. In the modification the detachable key 15 has a lug "b to engage a corresponding recess in the plate 0 on the shaft '17 and a shoulder cl to'engage'an'edge of the plate '0. With the detachable key in can be rotated'to operate the'lock.

'ter falls down in front'of the bolt, as shown TTO Having thus described the invention, what I claim and desire to secure by Letters Patent, is:

1. In a sash-lock, a main casing having an opening in its face, a bolt movably mounted in the main casing, a spring normally pressing the bolt outward through the opening in the face of the main casing, means for retracting the bolt against the action of the spring, a pivoted drop-latch having a horizontal movement therein and also a vertical movement across the opening in the face of the main casing operatin when depressed in front of the bolt to ho d the latter in a retracted position, a lug on said drop-latch to be projected beyond the face of the main casing when the drop-latch engages the bolt to hold the latter in its retracted position, a supplemental casing movable relative to the main casing provided with an opening to receive the head of the bolt operating to engage said lug to raise the drop-latch vertically to release the bolt when the two casings come together, and a second spring weaker than the first spring operating to move the drop-latch horizontally inward when the drop-latch is disengaged from the bolt to free said lug from the supplemental casing and said second spring also operating to depress the drop-latch across the opening in the face of the main casing in front of the bolt when the latter is retracted.

2. In a sash-lock, a main casing having an opening in its face, a bolt movably mounted in the main casing, a spring normally pressing the bolt outward through the opening in the face of the main casing, means for retracting the bolt against the action of the spring, a pivoted drop-latch in the main casing having a horizontal movement and a vertical movement across the opening in the face of the main casing operating to hold the bolt in a retracted position, a supple mental casing movable relative to the main casing operating to engage and raise the drop-latch vertically to release the bolt when the two casings come together, and a spring operating to move the drop-latch horizontally inward clear of the supplemental casing when said drop-latch is disengaged from the bolt and said spring also operating to depress the drop-latch across the opening in the face of the main casing to hold the bolt in a retracted position.

In testimony whereof I hereunto afliX my signature in the presence of two witnesses.

LAWRENCE R. EDDY.

Witnesses:

ARTHUR L. BRYANT, H. E. ROCKWELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G." 

